Due to the popularity of sightings of crop circles during the summer, the couple don't need to look far to know where to head off to.

"They are usually recorded on the internet and we get emails and phone calls from people that spot them," Mr Alexander said.

"At this time of year there are people out and about looking for them, there are a lot of tourists who come over and spot them."

Taking to the sky, Mr Alexander sits next to the helicopter pilot with the door open while his wife, aged 46, takes the back seat and changes over the camera lenses and equipment necessary to get the right shot.

"It's all done safely and with insurance," he added.

They have decided to stay away from using drones in order to prevent privacy issues arising and the possibility of technology failing.

Mr Alexander himself has been interested in the formation of crop circles for 30 years, but said they remain a "complete mystery" when asked how they appear.

"People claim to make them but there's no evidence apart from speculation, wild theories and attention seekers," he said.